/*
 * jQuery UI Tabs 1.6
 *
 * Copyright (c) 2008 AUTHORS.txt (http://ui.jquery.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Tabs
 *
 * Depends:
 *	ui.core.js
 */
(function($) {

    $.widget("ui.tabs", {
        _init: function() {
            // create tabs
            this._tabify(true);
        },
        destroy: function() {
            var o = this.options;
            this.element.unbind('.tabs')
                    .removeClass(o.navClass).removeData('tabs');
            this.$tabs.each(function() {
                var href = $.data(this, 'href.tabs');
                if (href)
                    this.href = href;
                var $this = $(this).unbind('.tabs');
                $.each(['href', 'load', 'cache'], function(i, prefix) {
                    $this.removeData(prefix + '.tabs');
                });
            });
            this.$lis.add(this.$panels).each(function() {
                if ($.data(this, 'destroy.tabs'))
                    $(this).remove();
                else
                    $(this).removeClass([o.selectedClass, o.deselectableClass,
                        o.disabledClass, o.panelClass, o.hideClass].join(' '));
            });
            if (o.cookie)
                this._cookie(null, o.cookie);
        },
        _setData: function(key, value) {
            if ((/^selected/).test(key))
                this.select(value);
            else {
                this.options[key] = value;
                this._tabify();
            }
        },
        length: function() {
            return this.$tabs.length;
        },
        _tabId: function(a) {
            return a.title && a.title.replace(/\s/g, '_').replace(/[^A-Za-z0-9\-_:\.]/g, '')
                    || this.options.idPrefix + $.data(a);
        },
        _sanitizeSelector: function(hash) {
            return hash.replace(/:/g, '\\:'); // we need this because an id may contain a ":"
        },
        _cookie: function() {
            var cookie = this.cookie || (this.cookie = 'ui-tabs-' + $.data(this.element[0]));
            return $.cookie.apply(null, [cookie].concat($.makeArray(arguments)));
        },
        _tabify: function(init) {

            this.$lis = $('li:has(a[href])', this.element);
            this.$tabs = this.$lis.map(function() {
                return $('a', this)[0];
            });
            this.$panels = $([]);

            var self = this, o = this.options;

            this.$tabs.each(function(i, a) {
                // inline tab
                if (a.hash && a.hash.replace('#', '')) // Safari 2 reports '#' for an empty hash
                    self.$panels = self.$panels.add(self._sanitizeSelector(a.hash));
                // remote tab
                else if ($(a).attr('href') != '#') { // prevent loading the page itself if href is just "#"
                    $.data(a, 'href.tabs', a.href); // required for restore on destroy
                    $.data(a, 'load.tabs', a.href); // mutable
                    var id = self._tabId(a);
                    a.href = '#' + id;
                    var $panel = $('#' + id);
                    if (!$panel.length) {
                        $panel = $(o.panelTemplate).attr('id', id).addClass(o.panelClass)
                                .insertAfter(self.$panels[i - 1] || self.element);
                        $panel.data('destroy.tabs', true);
                    }
                    self.$panels = self.$panels.add($panel);
                }
                // invalid tab href
                else
                    o.disabled.push(i + 1);
            });

            // initialization from scratch
            if (init) {

                // attach necessary classes for styling if not present
                this.element.addClass(o.navClass);
                this.$panels.addClass(o.panelClass);

                // Selected tab
                // use "selected" option or try to retrieve:
                // 1. from fragment identifier in url
                // 2. from cookie
                // 3. from selected class attribute on <li>
                if (o.selected === undefined) {
                    if (location.hash) {
                        this.$tabs.each(function(i, a) {
                            if (a.hash == location.hash) {
                                o.selected = i;
                                return false; // break
                            }
                        });
                    }
                    else if (o.cookie) {
                        var index = parseInt(self._cookie(), 10);
                        if (index && self.$tabs[index])
                            o.selected = index;
                    }
                    else if (self.$lis.filter('.' + o.selectedClass).length)
                        o.selected = self.$lis.index(self.$lis.filter('.' + o.selectedClass)[0]);
                }
                o.selected = o.selected === null || o.selected !== undefined ? o.selected : 0; // first tab selected by default

                // Take disabling tabs via class attribute from HTML
                // into account and update option properly.
                // A selected tab cannot become disabled.
                o.disabled = $.unique(o.disabled.concat(
                        $.map(this.$lis.filter('.' + o.disabledClass),
                        function(n, i) {
                            return self.$lis.index(n);
                        })
                        )).sort();
                if ($.inArray(o.selected, o.disabled) != -1)
                    o.disabled.splice($.inArray(o.selected, o.disabled), 1);

                // highlight selected tab
                this.$panels.addClass(o.hideClass);
                this.$lis.removeClass(o.selectedClass);
                if (o.selected !== null) {
                    this.$panels.eq(o.selected).removeClass(o.hideClass);
                    var classes = [o.selectedClass];
                    if (o.deselectable)
                        classes.push(o.deselectableClass);
                    this.$lis.eq(o.selected).addClass(classes.join(' '));

                    // seems to be expected behavior that the show callback is fired
                    var onShow = function() {
                        self._trigger('show', null,
                                self.ui(self.$tabs[o.selected], self.$panels[o.selected]));
                    };

                    // load if remote tab
                    if ($.data(this.$tabs[o.selected], 'load.tabs'))
                        this.load(o.selected, onShow);
                    // just trigger show event
                    else
                        onShow();
                }

                // clean up to avoid memory leaks in certain versions of IE 6
                $(window).bind('unload', function() {
                    self.$tabs.unbind('.tabs');
                    self.$lis = self.$tabs = self.$panels = null;
                });

            }
            // update selected after add/remove
            else
                o.selected = this.$lis.index(this.$lis.filter('.' + o.selectedClass)[0]);

            // set or update cookie after init and add/remove respectively
            if (o.cookie)
                this._cookie(o.selected, o.cookie);

            // disable tabs
            for (var i = 0, li; li = this.$lis[i]; i++)
                $(li)[$.inArray(i, o.disabled) != -1 && !$(li).hasClass(o.selectedClass) ? 'addClass' : 'removeClass'](o.disabledClass);

            // reset cache if switching from cached to not cached
            if (o.cache === false)
                this.$tabs.removeData('cache.tabs');

            // set up animations
            var hideFx, showFx;
            if (o.fx) {
                if (o.fx.constructor == Array) {
                    hideFx = o.fx[0];
                    showFx = o.fx[1];
                }
                else
                    hideFx = showFx = o.fx;
            }

            // Reset certain styles left over from animation
            // and prevent IE's ClearType bug...
            function resetStyle($el, fx) {
                $el.css({display: ''});
                if ($.browser.msie && fx.opacity)
                    $el[0].style.removeAttribute('filter');
            }

            // Show a tab...
            var showTab = showFx ?
                    function(clicked, $show) {
                        $show.animate(showFx, showFx.duration || 'normal', function() {
                            $show.removeClass(o.hideClass);
                            resetStyle($show, showFx);
                            self._trigger('show', null, self.ui(clicked, $show[0]));
                        });
                    } :
                    function(clicked, $show) {
                        $show.removeClass(o.hideClass);
                        self._trigger('show', null, self.ui(clicked, $show[0]));
                    };

            // Hide a tab, $show is optional...
            var hideTab = hideFx ?
                    function(clicked, $hide, $show) {
                        $hide.animate(hideFx, hideFx.duration || 'normal', function() {
                            $hide.addClass(o.hideClass);
                            resetStyle($hide, hideFx);
                            if ($show)
                                showTab(clicked, $show, $hide);
                        });
                    } :
                    function(clicked, $hide, $show) {
                        $hide.addClass(o.hideClass);
                        if ($show)
                            showTab(clicked, $show);
                    };

            // Switch a tab...
            function switchTab(clicked, $li, $hide, $show) {
                var classes = [o.selectedClass];
                if (o.deselectable)
                    classes.push(o.deselectableClass);
                $li.addClass(classes.join(' ')).siblings().removeClass(classes.join(' '));
                hideTab(clicked, $hide, $show);
            }

            // attach tab event handler, unbind to avoid duplicates from former tabifying...
            this.$tabs.unbind('.tabs').bind(o.event + '.tabs', function() {

                //var trueClick = event.clientX; // add to history only if true click occured, not a triggered click
                var $li = $(this).parents('li:eq(0)'),
                        $hide = self.$panels.filter(':visible'),
                        $show = $(self._sanitizeSelector(this.hash));

                // If tab is already selected and not deselectable or tab disabled or
                // or is already loading or click callback returns false stop here.
                // Check if click handler returns false last so that it is not executed
                // for a disabled or loading tab!
                if (($li.hasClass(o.selectedClass) && !o.deselectable)
                        || $li.hasClass(o.disabledClass)
                        || $(this).hasClass(o.loadingClass)
                        || self._trigger('select', null, self.ui(this, $show[0])) === false
                        ) {
                    this.blur();
                    return false;
                }

                o.selected = self.$tabs.index(this);

                // if tab may be closed
                if (o.deselectable) {
                    if ($li.hasClass(o.selectedClass)) {
                        self.options.selected = null;
                        $li.removeClass([o.selectedClass, o.deselectableClass].join(' '));
                        self.$panels.stop();
                        hideTab(this, $hide);
                        this.blur();
                        return false;
                    } else if (!$hide.length) {
                        self.$panels.stop();
                        var a = this;
                        self.load(self.$tabs.index(this), function() {
                            $li.addClass([o.selectedClass, o.deselectableClass].join(' '));
                            showTab(a, $show);
                        });
                        this.blur();
                        return false;
                    }
                }

                if (o.cookie)
                    self._cookie(o.selected, o.cookie);

                // stop possibly running animations
                self.$panels.stop();

                // show new tab
                if ($show.length) {
                    var a = this;
                    self.load(self.$tabs.index(this), $hide.length ?
                            function() {
                                switchTab(a, $li, $hide, $show);
                            } :
                            function() {
                                $li.addClass(o.selectedClass);
                                showTab(a, $show);
                            }
                    );
                } else
                    throw 'jQuery UI Tabs: Mismatching fragment identifier.';

                // Prevent IE from keeping other link focussed when using the back button
                // and remove dotted border from clicked link. This is controlled via CSS
                // in modern browsers; blur() removes focus from address bar in Firefox
                // which can become a usability and annoying problem with tabs('rotate').
                if ($.browser.msie)
                    this.blur();

                return false;

            });

            // disable click if event is configured to something else
            if (o.event != 'click')
                this.$tabs.bind('click.tabs', function() {
                    return false;
                });

        },
        add: function(url, label, index) {
            if (index == undefined)
                index = this.$tabs.length; // append by default

            var o = this.options;
            var $li = $(o.tabTemplate.replace(/#\{href\}/g, url).replace(/#\{label\}/g, label));
            $li.data('destroy.tabs', true);

            var id = url.indexOf('#') == 0 ? url.replace('#', '') : this._tabId($('a:first-child', $li)[0]);

            // try to find an existing element before creating a new one
            var $panel = $('#' + id);
            if (!$panel.length) {
                $panel = $(o.panelTemplate).attr('id', id)
                        .addClass(o.hideClass)
                        .data('destroy.tabs', true);
            }
            $panel.addClass(o.panelClass);
            if (index >= this.$lis.length) {
                $li.appendTo(this.element);
                $panel.appendTo(this.element[0].parentNode);
            } else {
                $li.insertBefore(this.$lis[index]);
                $panel.insertBefore(this.$panels[index]);
            }

            o.disabled = $.map(o.disabled,
                    function(n, i) {
                        return n >= index ? ++n : n
                    });

            this._tabify();

            if (this.$tabs.length == 1) {
                $li.addClass(o.selectedClass);
                $panel.removeClass(o.hideClass);
                var href = $.data(this.$tabs[0], 'load.tabs');
                if (href)
                    this.load(index, href);
            }

            // callback
            this._trigger('add', null, this.ui(this.$tabs[index], this.$panels[index]));
        },
        remove: function(index) {
            var o = this.options, $li = this.$lis.eq(index).remove(),
                    $panel = this.$panels.eq(index).remove();

            // If selected tab was removed focus tab to the right or
            // in case the last tab was removed the tab to the left.
            if ($li.hasClass(o.selectedClass) && this.$tabs.length > 1)
                this.select(index + (index + 1 < this.$tabs.length ? 1 : -1));

            o.disabled = $.map($.grep(o.disabled, function(n, i) {
                return n != index;
            }),
                    function(n, i) {
                        return n >= index ? --n : n
                    });

            this._tabify();

            // callback
            this._trigger('remove', null, this.ui($li.find('a')[0], $panel[0]));
        },
        enable: function(index) {
            var o = this.options;
            if ($.inArray(index, o.disabled) == -1)
                return;

            var $li = this.$lis.eq(index).removeClass(o.disabledClass);
            if ($.browser.safari) { // fix disappearing tab (that used opacity indicating disabling) after enabling in Safari 2...
                $li.css('display', 'inline-block');
                setTimeout(function() {
                    $li.css('display', 'block');
                }, 0);
            }

            o.disabled = $.grep(o.disabled, function(n, i) {
                return n != index;
            });

            // callback
            this._trigger('enable', null, this.ui(this.$tabs[index], this.$panels[index]));
        },
        disable: function(index) {
            var self = this, o = this.options;
            if (index != o.selected) { // cannot disable already selected tab
                this.$lis.eq(index).addClass(o.disabledClass);

                o.disabled.push(index);
                o.disabled.sort();

                // callback
                this._trigger('disable', null, this.ui(this.$tabs[index], this.$panels[index]));
            }
        },
        select: function(index) {
            // TODO make null as argument work
            if (typeof index == 'string')
                index = this.$tabs.index(this.$tabs.filter('[href$=' + index + ']')[0]);
            this.$tabs.eq(index).trigger(this.options.event + '.tabs');
        },
        load: function(index, callback) { // callback is for internal usage only

            var self = this, o = this.options, $a = this.$tabs.eq(index), a = $a[0],
                    bypassCache = callback == undefined || callback === false, url = $a.data('load.tabs');

            callback = callback || function() {
            };

            // no remote or from cache - just finish with callback
            if (!url || !bypassCache && $.data(a, 'cache.tabs')) {
                callback();
                return;
            }

            // load remote from here on

            var inner = function(parent) {
                var $parent = $(parent), $inner = $parent.find('*:last');
                return $inner.length && $inner.is(':not(img)') && $inner || $parent;
            };
            var cleanup = function() {
                self.$tabs.filter('.' + o.loadingClass).removeClass(o.loadingClass)
                        .each(function() {
                    if (o.spinner)
                        inner(this).parent().html(inner(this).data('label.tabs'));
                });
                self.xhr = null;
            };

            if (o.spinner) {
                var label = inner(a).html();
                inner(a).wrapInner('<em></em>')
                        .find('em').data('label.tabs', label).html(o.spinner);
            }

            var ajaxOptions = $.extend({}, o.ajaxOptions, {
                url: url,
                success: function(r, s) {
                    $(self._sanitizeSelector(a.hash)).html(r);
                    cleanup();

                    if (o.cache)
                        $.data(a, 'cache.tabs', true); // if loaded once do not load them again

                    // callbacks
                    self._trigger('load', null, self.ui(self.$tabs[index], self.$panels[index]));
                    try {
                        o.ajaxOptions.success(r, s);
                    }
                    catch (event) {
                    }

                    // This callback is required because the switch has to take
                    // place after loading has completed. Call last in order to
                    // fire load before show callback...
                    callback();
                }
            });
            if (this.xhr) {
                // terminate pending requests from other tabs and restore tab label
                this.xhr.abort();
                cleanup();
            }
            $a.addClass(o.loadingClass);
            self.xhr = $.ajax(ajaxOptions);
        },
        url: function(index, url) {
            this.$tabs.eq(index).removeData('cache.tabs').data('load.tabs', url);
        },
        ui: function(tab, panel) {
            return {
                options: this.options,
                tab: tab,
                panel: panel,
                index: this.$tabs.index(tab)
            };
        }

    });

    $.extend($.ui.tabs, {
        version: '1.6',
        getter: 'length',
        defaults: {
            ajaxOptions: null,
            cache: false,
            cookie: null, // e.g. { expires: 7, path: '/', domain: 'jquery.com', secure: true }
            deselectable: false,
            deselectableClass: 'ui-tabs-deselectable',
            disabled: [],
            disabledClass: 'ui-tabs-disabled',
            event: 'click',
            fx: null, // e.g. { height: 'toggle', opacity: 'toggle', duration: 200 }
            hideClass: 'ui-tabs-hide',
            idPrefix: 'ui-tabs-',
            loadingClass: 'ui-tabs-loading',
            navClass: 'ui-tabs-nav',
            panelClass: 'ui-tabs-panel',
            panelTemplate: '<div></div>',
            selectedClass: 'ui-tabs-selected',
            spinner: 'Loading&#8230;',
            tabTemplate: '<li><a href="#{href}"><span>#{label}</span></a></li>'
        }
    });

    /*
     * Tabs Extensions
     */

    /*
     * Rotate
     */
    $.extend($.ui.tabs.prototype, {
        rotation: null,
        rotate: function(ms, continuing) {

            continuing = continuing || false;

            var self = this, t = this.options.selected;

            function start() {
                self.rotation = setInterval(function() {
                    t = ++t < self.$tabs.length ? t : 0;
                    self.select(t);
                }, ms);
            }

            function stop(event) {
                if (!event || event.clientX) { // only in case of a true click
                    clearInterval(self.rotation);
                }
            }

            // start interval
            if (ms) {
                start();
                if (!continuing)
                    this.$tabs.bind(this.options.event + '.tabs', stop);
                else
                    this.$tabs.bind(this.options.event + '.tabs', function() {
                        stop();
                        t = self.options.selected;
                        start();
                    });
            }
            // stop interval
            else {
                stop();
                this.$tabs.unbind(this.options.event + '.tabs', stop);
            }
        }
    });

})(jQuery);
